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Timezone converter
EST to IST currently uses Eastern Time in America/New_York and India Time in Asia/Kolkata as the live reference pair, with a +9h 30m live gap. EST and IST is the canonical US East Coast to India workday bridge. It is the spine of nightly outsourcing handoffs, follow-the-sun engineering between New York and Bangalore or Hyderabad, and customer-success rotations covering both regions during the limited morning-evening window.
Last updated recently. Offset math, DST behavior, and city coverage on both sides are refreshed from the live timezone dataset during the page revalidation window.
IST is ambiguous in this dataset, so the live converter uses Asia/Kolkata as the busiest reference zone while the city list below shows the wider label family.
From
Eastern Time
America/New_York · EDT -04:00
Major markets in this grouping include New York City, Toronto, Brooklyn, Queens.
To
India Time
Asia/Kolkata · GMT+5:30 +05:30
Major markets in this grouping include Mumbai, Delhi, Bengaluru, Hyderabad.
Current gap
+9h 30m
EST -04:00 vs IST +05:30
9-to-5 overlap
No shared block
Meetings usually need an early or late handoff.
Representative countries
United States, Canada, and Haiti / India, Israel, and Sri Lanka
Based on the busiest city and zone usage found in the current dataset.
EST (New York City, -04:00) to IST (Mumbai, +05:30) is currently a +9h 30m conversion. Live coverage on the EST side is anchored by New York City, Toronto, Brooklyn, and Queens; the IST side draws from Mumbai, Delhi, Bengaluru, and Hyderabad.
EST and IST is the canonical US East Coast to India workday bridge. It is the spine of nightly outsourcing handoffs, follow-the-sun engineering between New York and Bangalore or Hyderabad, and customer-success rotations covering both regions during the limited morning-evening window.
This pair is trans-Pacific, with one side in the Americas and the other in Asia or Oceania. The +9h 30m gap is large enough that morning on one side reliably overlaps evening on the other, which is why this conversion mostly serves global supply chains, gaming launch schedules, and follow-the-sun engineering.
EST follows seasonal clock changes through America/New_York, while IST stays on a fixed offset year-round. That asymmetry is the real differentiator on this page: the gap widens or narrows by an hour twice a year, so calendar invites scheduled in one season often look wrong in the other.
EST and IST sit 9h 30m apart, which leaves no shared 9-to-5 block. Live meetings have to bend one side's day, so most teams settle for one of two narrow windows: very early on the late side, or very late on the early side. That makes async messages, recorded standups, and clear handoff notes more valuable than calendar invites.
Reference zone, current offsets, country and city anchors, overlap math, and date-shift answers for EST to IST.
Reference pair
America/New_York -> Asia/Kolkata
Live offsets
EST -04:00 vs IST +05:30
Meaning split
Eastern Time / India Time
Country anchors
United States, Canada, and Haiti -> India, Israel, and Sri Lanka
City anchors
New York City, Toronto, Brooklyn, Queens -> Mumbai, Delhi, Bengaluru, Hyderabad
Workday overlap
No strict 9-to-5 overlap in the current offset state
Morning answer
9 AM EST = 6:30 PM IST, same day
Evening answer
6 PM EST = 3:30 AM IST, next day
Same-offset labels can share the same hour while still landing in different countries, calendars, cities, and workday windows. These notes show the practical context behind this conversion.
EST to IST is pinned to America/New_York -> Asia/Kolkata, with the shorthand labels shown as context. The city anchors are New York City, Toronto, Brooklyn, Queens on the EST side and Mumbai, Delhi, Bengaluru, Hyderabad on the IST side, with +9h 30m between the live reference zones.
The 12 popular-hour answers include 7 same-day conversions, 5 next-day conversions, and 0 previous-day conversions. That distribution is what separates this page from a static offset chart.
Nearby labels sharing a current offset include EDT (From side). They may match mathematically, but their country calendars, city anchors, and common search intent differ from this exact pair.
EST: United States (US); 1508 mapped cities; capital Washington, D.C.; English; USD United States dollar | EST: Canada (CA); 310 mapped cities; capital Ottawa; English, French; CAD Canadian dollar | EST: Haiti (HT); 30 mapped cities; capital Port-au-Prince; French, Haitian Creole; HTG Haitian gourde | EST: Jamaica (JM); 11 mapped cities; capital Kingston; English, Jamaican Patois; JMD Jamaican dollar | EST: Mexico (MX); 6 mapped cities; capital Mexico City; Spanish; MXN Mexican peso | IST: India (IN); 3776 mapped cities; capital New Delhi; English, Hindi, Tamil; INR Indian rupee | IST: Israel (IL); 108 mapped cities; capital Jerusalem; Arabic, Hebrew; ILS Israeli new shekel | IST: Sri Lanka (LK); 60 mapped cities; capital Sri Jayawardenepura Kotte; Sinhala, Tamil; LKR Sri Lankan rupee
Offset behavior, DST gap changes, local calendar evidence, and the day-shift pattern across the most common conversion hours.
EST/IST is a long-haul handoff gap: America/New_York currently reads -04:00, Asia/Kolkata reads +05:30, and the live delta is +9h 30m. This class decides whether the page behaves like a same-day planner or a handoff planner.
America/New_York changes from -04:00 (EDT) to -05:00 (EST) on November 1, 2026 at about 1:00 AM.
No country holiday snapshot is attached to this exact pair yet, so the page leans on city anchors, IANA zones, offsets, and the live conversion table instead of pretending a local calendar exists.
Across the 12 popular-hour answers, this pair has 7 same-day answers, 5 next-day answers, 0 previous-day answers. That mix is specific to the current America/New_York -> Asia/Kolkata relationship and helps users see whether dates must be written explicitly in invites, travel plans, and release schedules.
Same-offset converter clusters can look identical if the page only shows a numeric offset. This audit states whether the route should be indexed, which canonical peer it follows when consolidated, and what pair-specific evidence keeps the page useful.
This pair remains indexable because the route has enough pair-specific context: America/New_York -> Asia/Kolkata, country anchors, city anchors, calendar notes, and day-shift examples.
EST and IST are not currently a same-offset pair; the live delta is +9h 30m. Same-offset neighbors are still listed because users often confuse nearby abbreviations.
EDT (From side, -04:00) The page keeps these labels visible so SGT/HKT/GST-style clusters do not blur into one generic offset page.
EST/IST uses 7 same-day answers, 5 next-day answers, 0 previous-day answers; 0h strict workday overlap; source zones America/New_York and Asia/Kolkata; country anchors United States, Canada, and Haiti -> India, Israel, and Sri Lanka.
Same-offset conversions can still land in different public-holiday, language, currency, and city-anchor contexts. These rows use the country profile and holiday snapshots behind each side of the pair.
EST
1,508 mapped city anchors; zones America/New_York.capital Washington, D.C.; English; USD United States dollar
Holiday snapshot: New Year's Day (Jan 1, Public) · Martin Luther King, Jr. Day (Jan 19, Public) · Lincoln's Birthday (Feb 12, Observance) · Presidents Day (Feb 16, Public) · Good Friday (Apr 3, Public)
EST
310 mapped city anchors; zones America/Atikokan, America/Toronto.capital Ottawa; English, French; CAD Canadian dollar
Holiday snapshot: New Year's Day (Jan 1, Public) · Louis Riel Day (Feb 16, Public) · Islander Day (Feb 16, Public) · Heritage Day (Feb 16, Public) · Family Day (Feb 16, Public)
EST
30 mapped city anchors; zones America/Port-au-Prince.capital Port-au-Prince; French, Haitian Creole; HTG Haitian gourde
Holiday snapshot: New Year's Day (Jan 1, Public) · Ancestry Day (Jan 2, Public) · Epiphany (Jan 6, Public) · Carnival (Feb 16, Public) · Carnival (Feb 17, Public)
EST
11 mapped city anchors; zones America/Jamaica.capital Kingston; English, Jamaican Patois; JMD Jamaican dollar
Holiday snapshot: New Year's Day (Jan 1, Public) · Ash Wednesday (Feb 18, Public) · Good Friday (Apr 3, Public) · Easter Monday (Apr 6, Public) · Labour Day (May 23, Public)
EST
6 mapped city anchors; zones America/Cancun.capital Mexico City; Spanish; MXN Mexican peso
Holiday snapshot: New Year's Day (Jan 1, Public) · Constitution Day (Feb 2, Public) · Benito Juárez's birthday (Mar 16, Public) · Maundy Thursday (Apr 2, Bank) · Good Friday (Apr 3, Bank)
IST
3,776 mapped city anchors; zones Asia/Kolkata.capital New Delhi; English, Hindi, Tamil; INR Indian rupee
Holiday snapshot: Republic Day (Jan 26, Public) · Holi (Mar 4, Public) · Eid al-Fitr (Mar 21, Public) · Mahavir Jayanti (Mar 31, Public) · Good Friday (Apr 3, Public)
Pair-specific dossier
EST to IST is a high-intent conversion because it often means New York or Toronto to India, but IST is ambiguous. India Standard Time (Asia/Kolkata), Irish Standard Time (Europe/Dublin in summer), and Israel Standard Time (Asia/Jerusalem) are all plausible depending on the source.
If the target is India, the standard winter gap from EST to IST is ten and a half hours. That half-hour offset matters for calendar invites, support shifts, software releases, payroll deadlines, and cricket/media schedules. If the target is Ireland or Israel, the answer is completely different.
The page should therefore read as both a converter and a disambiguation guardrail: first confirm what IST means, then check the local calendar and the receiving city's working window.
Most often used by US East Coast teams coordinating with India-based engineering, support, finance, recruiting, or media teams, while preserving a visible warning that IST is ambiguous.
For India, 09:00 EST is 19:30 IST during literal EST winter alignment, while 09:00 EDT is 18:30 India time. That one-hour seasonal drift affects recurring standups and escalation windows because India does not observe DST.
India's holiday calendar includes Republic Day, Holi, Eid, Independence Day, Gandhi Jayanti, Diwali, Christmas, and many state holidays. Ireland and Israel have completely different calendars; this is why the IST meaning must be resolved before the holiday check.
Not the same as EST/GMT or EST/CET. The India reading adds a half-hour offset and no DST; the Irish and Israeli readings have seasonal rules and different legal calendars.
Three-letter abbreviations are ambiguous. The IANA zone identifier above is the canonical reference; software, contracts, and calendar storage should use it instead of the abbreviation.
These are the labels most likely to be confused with either side of this conversion. A matching UTC offset does not mean the same country, calendar, market, source convention, or user intent.
EST and EDT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.
EST and EEST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and EET are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and AEDT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and AEST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
EST and WIT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
IST and IOT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
IST and AFT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
IST and BST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
IST and BTT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
IST and CCT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
IST and FSAT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.
Abbreviations with the same UTC offset can still represent different countries, cities, currencies, languages, and civil-time histories. This roster keeps theEST to IST page grounded in those concrete places.
EST: United States (US); 1508 mapped cities; zones America/New York; city anchors New York City (America/New_York, pop 8,804,190), Brooklyn (America/New_York, pop 2,736,074), Queens (America/New_York, pop 2,316,841), Philadelphia (America/New_York, pop 1,573,916); official United States of America; capital Washington, D.C.; region Americas; subregion North America; population 340,110,988; area 9,525,067 km2; languages English; currency USD United States dollar.
EST: Canada (CA); 310 mapped cities; zones America/Atikokan, America/Toronto; city anchors Toronto (America/Toronto, pop 2,794,356), Montréal (America/Toronto, pop 1,762,949), Ottawa (America/Toronto, pop 1,017,449), Mississauga (America/Toronto, pop 717,961); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar.
EST: Haiti (HT); 30 mapped cities; zones America/Port-au-Prince; city anchors Port-au-Prince (America/Port-au-Prince, pop 1,234,742), Carrefour (America/Port-au-Prince, pop 442,156), Delmas (America/Port-au-Prince, pop 382,920), Port-de-Paix (America/Port-au-Prince, pop 306,217); official Republic of Haiti; capital Port-au-Prince; region Americas; subregion Caribbean; population 11,867,032; area 27,750 km2; languages French, Haitian Creole; currency HTG Haitian gourde.
EST: Jamaica (JM); 11 mapped cities; zones America/Jamaica; city anchors Kingston (America/Jamaica, pop 937,700), New Kingston (America/Jamaica, pop 583,958), Spanish Town (America/Jamaica, pop 145,018), Portmore (America/Jamaica, pop 102,861); official Jamaica; capital Kingston; region Americas; subregion Caribbean; population 2,825,544; area 10,991 km2; languages English, Jamaican Patois; currency JMD Jamaican dollar.
EST: Mexico (MX); 6 mapped cities; zones America/Cancun; city anchors Cancún (America/Cancun, pop 888,797), Chetumal (America/Cancun, pop 169,028), Playa del Carmen (America/Cancun, pop 149,923), Cozumel (America/Cancun, pop 77,236); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso.
IST: India (IN); 3776 mapped cities; zones Asia/Kolkata; city anchors Mumbai (Asia/Kolkata, pop 12,691,836), Delhi (Asia/Kolkata, pop 11,034,555), Bengaluru (Asia/Kolkata, pop 8,495,492), Hyderabad (Asia/Kolkata, pop 6,993,262); official Republic of India; capital New Delhi; region Asia; subregion Southern Asia; population 1,417,492,000; area 3,287,263 km2; languages English, Hindi, Tamil; currency INR Indian rupee.
IST: Israel (IL); 108 mapped cities; zones Asia/Jerusalem; city anchors Jerusalem (Asia/Jerusalem, pop 971,800), Tel Aviv (Asia/Jerusalem, pop 432,892), West Jerusalem (Asia/Jerusalem, pop 400,000), Haifa (Asia/Jerusalem, pop 285,316); official State of Israel; capital Jerusalem; region Asia; subregion Western Asia; population 10,134,800; area 21,937 km2; languages Arabic, Hebrew; currency ILS Israeli new shekel.
IST: Sri Lanka (LK); 60 mapped cities; zones Asia/Colombo; city anchors Colombo (Asia/Colombo, pop 648,034), Dehiwala-Mount Lavinia (Asia/Colombo, pop 219,827), Maharagama (Asia/Colombo, pop 195,355), Jaffna (Asia/Colombo, pop 169,102); official Democratic Socialist Republic of Sri Lanka; capital Sri Jayawardenepura Kotte; region Asia; subregion Southern Asia; population 21,763,170; area 65,610 km2; languages Sinhala, Tamil; currency LKR Sri Lankan rupee.
Same-offset converter pages can look deceptively alike. These records pin the page to the exact abbreviations, IANA zones, countries, and city anchors behind EST and IST.
EST (est) is not marked ambiguous in the abbreviation catalog. Meaning records: Eastern Time at UTC-05:00; listed zones America/Atikokan; America/Cancun; America/Cayman; America/Jamaica; America/Panama; America/Nassau; America/New York; America/Port-au-Prince; America/Grand Turk; America/Toronto; source label Eastern Time - Atikokan.
EST currently maps to 8 country footprints in the converter dataset: United States (US), Canada (CA), Haiti (HT), Jamaica (JM), Mexico (MX), Panama (PA), Bahamas (BS), Cayman Islands (KY). The footprint spans 9 IANA zones across 10 city anchors.
EST city anchors in this indexed page family: New York City [new-york-city-US, US, America/New_York, pop 8,804,190]; Toronto [toronto-CA, CA, America/Toronto, pop 2,794,356]; Brooklyn [brooklyn-US, US, America/New_York, pop 2,736,074]; Queens [queens-US, US, America/New_York, pop 2,316,841]; Montréal [montreal-CA, CA, America/Toronto, pop 1,762,949]; Philadelphia [philadelphia-US, US, America/New_York, pop 1,573,916]; Manhattan [manhattan-5125771-US, US, America/New_York, pop 1,487,536]; The Bronx [the-bronx-US, US, America/New_York, pop 1,385,108]; Port-au-Prince [port-au-prince-HT, HT, America/Port-au-Prince, pop 1,234,742]; Ottawa [ottawa-CA, CA, America/Toronto, pop 1,017,449].
EST: United States (US); 1508 mapped cities; zones America/New York; city anchors New York City (America/New_York, pop 8,804,190), Brooklyn (America/New_York, pop 2,736,074), Queens (America/New_York, pop 2,316,841), Philadelphia (America/New_York, pop 1,573,916); official United States of America; capital Washington, D.C.; region Americas; subregion North America; population 340,110,988; area 9,525,067 km2; languages English; currency USD United States dollar. EST: Canada (CA); 310 mapped cities; zones America/Atikokan, America/Toronto; city anchors Toronto (America/Toronto, pop 2,794,356), Montréal (America/Toronto, pop 1,762,949), Ottawa (America/Toronto, pop 1,017,449), Mississauga (America/Toronto, pop 717,961); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar. EST: Haiti (HT); 30 mapped cities; zones America/Port-au-Prince; city anchors Port-au-Prince (America/Port-au-Prince, pop 1,234,742), Carrefour (America/Port-au-Prince, pop 442,156), Delmas (America/Port-au-Prince, pop 382,920), Port-de-Paix (America/Port-au-Prince, pop 306,217); official Republic of Haiti; capital Port-au-Prince; region Americas; subregion Caribbean; population 11,867,032; area 27,750 km2; languages French, Haitian Creole; currency HTG Haitian gourde. EST: Jamaica (JM); 11 mapped cities; zones America/Jamaica; city anchors Kingston (America/Jamaica, pop 937,700), New Kingston (America/Jamaica, pop 583,958), Spanish Town (America/Jamaica, pop 145,018), Portmore (America/Jamaica, pop 102,861); official Jamaica; capital Kingston; region Americas; subregion Caribbean; population 2,825,544; area 10,991 km2; languages English, Jamaican Patois; currency JMD Jamaican dollar. EST: Mexico (MX); 6 mapped cities; zones America/Cancun; city anchors Cancún (America/Cancun, pop 888,797), Chetumal (America/Cancun, pop 169,028), Playa del Carmen (America/Cancun, pop 149,923), Cozumel (America/Cancun, pop 77,236); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso.
IST (ist) is ambiguous in the abbreviation catalog. Meaning records: Israel Time at UTC+02:00; listed zones Asia/Jerusalem; source label Israel Time - Jerusalem, Tel Aviv, West Jerusalem, Haifa | India Time at UTC+05:30; listed zones Asia/Colombo; Asia/Kolkata; source label India Time - Colombo, Dehiwala-Mount Lavinia, Maharagama, Jaffna.
IST currently maps to 3 country footprints in the converter dataset: India (IN), Israel (IL), Sri Lanka (LK). The footprint spans 3 IANA zones across 10 city anchors.
IST city anchors in this indexed page family: Mumbai [mumbai-IN, IN, Asia/Kolkata, pop 12,691,836]; Delhi [delhi-IN, IN, Asia/Kolkata, pop 11,034,555]; Bengaluru [bengaluru-IN, IN, Asia/Kolkata, pop 8,495,492]; Hyderabad [hyderabad-IN, IN, Asia/Kolkata, pop 6,993,262]; Ahmedabad [ahmedabad-IN, IN, Asia/Kolkata, pop 6,357,693]; Chennai [chennai-IN, IN, Asia/Kolkata, pop 4,681,087]; Kolkata [kolkata-IN, IN, Asia/Kolkata, pop 4,631,392]; Surat [surat-IN, IN, Asia/Kolkata, pop 4,591,246]; Pune [pune-IN, IN, Asia/Kolkata, pop 3,124,458]; Jaipur [jaipur-IN, IN, Asia/Kolkata, pop 3,046,163].
IST: India (IN); 3776 mapped cities; zones Asia/Kolkata; city anchors Mumbai (Asia/Kolkata, pop 12,691,836), Delhi (Asia/Kolkata, pop 11,034,555), Bengaluru (Asia/Kolkata, pop 8,495,492), Hyderabad (Asia/Kolkata, pop 6,993,262); official Republic of India; capital New Delhi; region Asia; subregion Southern Asia; population 1,417,492,000; area 3,287,263 km2; languages English, Hindi, Tamil; currency INR Indian rupee. IST: Israel (IL); 108 mapped cities; zones Asia/Jerusalem; city anchors Jerusalem (Asia/Jerusalem, pop 971,800), Tel Aviv (Asia/Jerusalem, pop 432,892), West Jerusalem (Asia/Jerusalem, pop 400,000), Haifa (Asia/Jerusalem, pop 285,316); official State of Israel; capital Jerusalem; region Asia; subregion Western Asia; population 10,134,800; area 21,937 km2; languages Arabic, Hebrew; currency ILS Israeli new shekel. IST: Sri Lanka (LK); 60 mapped cities; zones Asia/Colombo; city anchors Colombo (Asia/Colombo, pop 648,034), Dehiwala-Mount Lavinia (Asia/Colombo, pop 219,827), Maharagama (Asia/Colombo, pop 195,355), Jaffna (Asia/Colombo, pop 169,102); official Democratic Socialist Republic of Sri Lanka; capital Sri Jayawardenepura Kotte; region Asia; subregion Southern Asia; population 21,763,170; area 65,610 km2; languages Sinhala, Tamil; currency LKR Sri Lankan rupee.
EST is a North or South American civil-time label, currently 4h behind UTC at -04:00. The label covers 10 IANA zones across 9 countries, with New York City as the busiest live reference. The busiest cities using EST in the current catalog are New York City, Toronto, Brooklyn, Queens, and Montréal. The lead live reference on this page is New York City (America/New_York), currently at -04:00 (EDT). Those cities are what give EST its actual feel rather than the abstract offset. EST currently shows -04:00, but America/New_York observes seasonal clock changes — the next transition is around November 1, 2026. That means the offset on this page is a snapshot, not a permanent fact, so long-range scheduling should pin the underlying IANA zone instead of the abbreviation.
EST reads cleanly across the Americas in this dataset, but the same letters can mean different things elsewhere (notably CST, EST, and IST overlap with non-American labels). Pin the IANA zone when the audience is international. America/New_York has an upcoming offset change on November 1, 2026. After that point, EST on this page will read a different UTC offset until the next transition, so any saved timestamp should anchor to the IANA zone rather than the abbreviation. For precise work, the safest equivalent of EST is the exact IANA zone used by your city or system. America/New_York sits at -04:00, behind UTC, which means daily logs in this zone reach a new calendar date after UTC does — relevant for date-aligned reports and billing cutoffs.
EST should not be blindly swapped with nearby labels. Adjacent references in the catalog: EDT (-04:00, Shares the eastern time family); EEST (+03:00, Shares the eastern time family); EET (+03:00, Shares the eastern time family); AEDT (+10:00, Shares the eastern time family); AEST (+10:00, Shares the eastern time family); WIT (+09:00, Shares the eastern time family).
EST has 1 meaning record, offset range UTC-05:00 to UTC-04:00, labels Eastern Time, and 9 country footprints across 10 IANA zones.
IST is reused across 2 different meanings in this dataset — India Time and Israel Time — which is why the short code alone is not enough to identify a place. Each meaning maps to its own IANA zone family and its own DST behavior, and they happen to share the same letters by historical accident more than by design. The busiest cities using IST in the current catalog are Mumbai, Delhi, Bengaluru, Hyderabad, and Ahmedabad. The lead live reference on this page is Mumbai (Asia/Kolkata), currently at +05:30 (GMT+5:30). Those cities are what give IST its actual feel rather than the abstract offset. Because IST spans UTC+02:00 to UTC+05:30 across the active meanings, software, calendars, and contracts should always pin a specific IANA zone such as Asia/Kolkata or a literal UTC offset. The short label is fine for headlines and chat; it is the wrong primitive for storing or scheduling timestamps.
IST appears with 2 distinct meanings in current data, splitting across UTC+02:00 to UTC+05:30. The short label looks tidy in writing but quietly hides which place you mean — pick a city, a country, or an IANA zone before it matters. Asia/Kolkata does not show an offset change in the next year, which makes IST predictable for short-term scheduling. Predictable is not the same as permanent — civil-time rules still get changed by governments on relatively short notice. For precise work, the safest equivalent of IST is the exact IANA zone used by your city or system. Asia/Kolkata sits at +05:30, ahead of UTC, which means daily logs in this zone reach a new calendar date before UTC does — a small detail that breaks date-based reporting if missed.
IST should not be blindly swapped with nearby labels. Adjacent references in the catalog: IOT (+06:00, Runs on a nearby UTC offset); AFT (+04:30, Runs on a nearby UTC offset); BST (+06:00, Runs on a nearby UTC offset); BTT (+06:00, Runs on a nearby UTC offset); CCT (+06:30, Runs on a nearby UTC offset); FSAT (+05:00, Runs on a nearby UTC offset).
IST has 2 meaning records, offset range UTC+02:00 to UTC+05:30, labels India Time, Israel Time, and 3 country footprints across 3 IANA zones.
EST country anchor United States: The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 341 million. Source: Wikipedia.
IST country anchor India: India, officially the Republic of India, is a country in South Asia. It is the seventh-largest country by area; the most populous country in the world and, since its independence in 1947, the world's most populous democracy. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal and Bhutan to the north; Bangladesh and Myanmar to the east. In the Indian Ocean, India is near Sri Lanka and the Maldives. Its Andaman and Nicobar Islands share a maritime border with Myanmar, Thailand and Indonesia. Source: Wikipedia.
EST/IST uses America/New_York -> Asia/Kolkata, offset delta +9h 30m, overlap 0h, route /convert/est/ist/, and live abbreviation readings EDT/GMT+5:30.
Reference fields include this converter pair's abbreviation records, representative IANA zones, current offsets, city anchors, country profiles, overlap math, conversion examples, and dossier notes.
EST coverage on this page is led by New York City, United States, Toronto, Canada, Brooklyn, United States, and Queens, United States, with 2 more in the live dataset. That mix is what makes EST feel anchored to East Coast and Central American business activity in practice rather than just an abbreviation on a chart.
IST coverage is led by Mumbai, India, Delhi, India, Bengaluru, India, and Hyderabad, India, with 2 more anchoring the wider label family. Combined with the EST side, this conversion ends up describing trans-Pacific outsourcing handoffs, gaming and entertainment release windows, and follow-the-sun engineering rotations.
Adjust the time. Digits roll like an odometer, and the swap button flips the zones.
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| EST | IST | Day relation |
|---|---|---|
| 9:00 AM | 6:30 PMMon, Jun 1 | same day |
| 12:00 PM | 9:30 PMMon, Jun 1 | same day |
| 3:00 PM | 12:30 AMTue, Jun 2 | next day |
| 6:00 PM | 3:30 AMTue, Jun 2 | next day |
| 9:00 PM | 6:30 AMTue, Jun 2 | next day |
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| IST | EST | Day relation |
|---|---|---|
| 9:00 AM | 11:30 PMMon, Jun 1 | previous day |
| 12:00 PM | 2:30 AMTue, Jun 2 | same day |
| 3:00 PM | 5:30 AMTue, Jun 2 | same day |
| 6:00 PM | 8:30 AMTue, Jun 2 | same day |
| 9:00 PM | 11:30 AMTue, Jun 2 | same day |
EST to IST ranges from EST 9:00 AM (which lands at IST 6:30 PM) through EST 9:00 PM (IST 6:30 AM). Most of those slots fall on a different calendar day on the IST side, which is why this direction always needs explicit dates in invites and ticket comments — the time alone is not enough.
IST to EST ranges from IST 9:00 AM (which lands at EST 11:30 PM) through IST 9:00 PM (EST 11:30 AM). With no clean 9-to-5 overlap between IST and EST, both ends of this range push outside standard hours — useful for recorded standups and async work, awkward for live calls.
These direct answers are here for the exact-intent searches people actually use, like “10 AM EST to IST” or “4 PM EST in IST”.
8 AM EST = 5:30 PM IST (17:30). On today's live calendar that lands on Mon, Jun 1 in IST, which means the answer is a same day conversion rather than a static offset lookup.
9 AM EST = 6:30 PM IST (18:30). On today's live calendar that lands on Mon, Jun 1 in IST, which means the answer is a same day conversion rather than a static offset lookup.
10 AM EST = 7:30 PM IST (19:30). On today's live calendar that lands on Mon, Jun 1 in IST, which means the answer is a same day conversion rather than a static offset lookup.
11 AM EST = 8:30 PM IST (20:30). On today's live calendar that lands on Mon, Jun 1 in IST, which means the answer is a same day conversion rather than a static offset lookup.
12 PM EST = 9:30 PM IST (21:30). On today's live calendar that lands on Mon, Jun 1 in IST, which means the answer is a same day conversion rather than a static offset lookup.
1 PM EST = 10:30 PM IST (22:30). On today's live calendar that lands on Mon, Jun 1 in IST, which means the answer is a same day conversion rather than a static offset lookup.
2 PM EST = 11:30 PM IST (23:30). On today's live calendar that lands on Mon, Jun 1 in IST, which means the answer is a same day conversion rather than a static offset lookup.
3 PM EST = 12:30 AM IST (00:30). On today's live calendar that lands on Tue, Jun 2 in IST, which means the answer is a next day conversion rather than a static offset lookup.
4 PM EST = 1:30 AM IST (01:30). On today's live calendar that lands on Tue, Jun 2 in IST, which means the answer is a next day conversion rather than a static offset lookup.
5 PM EST = 2:30 AM IST (02:30). On today's live calendar that lands on Tue, Jun 2 in IST, which means the answer is a next day conversion rather than a static offset lookup.
6 PM EST = 3:30 AM IST (03:30). On today's live calendar that lands on Tue, Jun 2 in IST, which means the answer is a next day conversion rather than a static offset lookup.
9 PM EST = 6:30 AM IST (06:30). On today's live calendar that lands on Tue, Jun 2 in IST, which means the answer is a next day conversion rather than a static offset lookup.
The live gap is +9h 30m right now, based on America/New_York at -04:00 and Asia/Kolkata at +05:30. America/New_York changes offset on November 1, 2026, so the gap moves to +10h 30m after that transition.
There is no strict 9 AM to 5 PM overlap right now, so this pair is better for handoffs, travel planning, or async coordination than for midday meetings.
America/New_York
EDT · -04:00
Asia/Kolkata
GMT+5:30 · +05:30
These are the busiest live references selected from the abbreviation families on this page.
| EST | IST |
|---|---|
| 20:00 | 05:30 |
| 21:00 | 06:30 |
| 22:00 | 07:30 |
| 23:00 | 08:30 |
| 00:00 | 09:30 |
| 01:00 | 10:30 |
| 02:00 | 11:30 |
| 03:00 | 12:30 |
| 04:00 | 13:30 |
| 05:00 | 14:30 |
| 06:00 | 15:30 |
| 07:00 | 16:30 |
| 08:00 | 17:30 |
| 09:00 | 18:30 |
| 10:00 | 19:30 |
| 11:00 | 20:30 |
| 12:00 | 21:30 |
| 13:00 | 22:30 |
| 14:00 | 23:30 |
| 15:00 | 00:30 |
| 16:00 | 01:30 |
| 17:00 | 02:30 |
| 18:00 | 03:30 |
| 19:00 | 04:30 |
Countries represented here include United States, Canada, and Haiti.
Countries represented here include India, Israel, and Sri Lanka.
Once a conversion pair matters, people usually need a city page, compare page, or a broader browse surface next.
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